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TrueType support for Canvas.

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8223 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robert Roebling
2000-08-30 16:20:37 +00:00
parent d1f9b20611
commit cb281cfc8c
5 changed files with 77 additions and 37 deletions
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6
contrib/include/wx/canvas/canvas.h
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@@ -98,7 +98,7 @@ private:
class wxCanvasText: public wxCanvasObject
{
public:
wxCanvasText( const wxString &text, int x, int y );
wxCanvasText( const wxString &text, int x, int y, const wxString &foneFile, int size );
~wxCanvasText();
virtual void Render( int clip_x, int clip_y, int clip_width, int clip_height );
@@ -116,6 +116,8 @@ private:
int m_red;
int m_green;
int m_blue;
wxString m_fontFileName;
int m_size;
};
//----------------------------------------------------------------------------
@@ -133,6 +135,7 @@ public:
virtual ~wxCanvas();
virtual void SetArea( int width, int height );
virtual void SetColour( unsigned char red, unsigned char green, unsigned char blue );
virtual void Update( int x, int y, int width, int height );
virtual void UpdateNow();
@@ -151,6 +154,7 @@ private:
bool m_needUpdate;
wxList m_updateRects;
wxList m_objects;
unsigned char m_green,m_red,m_blue;
friend class wxCanvasObject;

2
contrib/samples/canvas/test/Makefile.in
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@@ -17,7 +17,7 @@ PROGRAM=test
OBJECTS=test.o
APPEXTRALIBS=$(top_builddir)/lib/libcanvas.@WX_TARGET_LIBRARY_TYPE@
APPEXTRALIBS=$(top_builddir)/lib/libcanvas.@WX_TARGET_LIBRARY_TYPE@ -lfreetype
APPEXTRADEFS=-I$(top_srcdir)/contrib/include
include $(top_builddir)/src/makeprog.env

7
contrib/samples/canvas/test/test.cpp
View File

@@ -98,18 +98,19 @@ MyFrame::MyFrame()
m_canvas = new wxCanvas( this, -1, wxPoint(0,0), wxSize(10,10) );
m_canvas->SetArea( 400, 600 );
m_canvas->SetColour( 255, 255, 255 );
wxBitmap bitmap( smile_xpm );
wxImage image( bitmap );
m_co = new wxCanvasImage( image, 10, 50 );
m_canvas->Append( m_co );
m_canvas->Append( new wxCanvasImage( image, 80, 50 ) );
m_canvas->Append( new wxCanvasImage( image, 40, 50 ) );
wxButton *button = new wxButton( m_canvas, -1, "Hello", wxPoint(130,50) );
wxButton *button = new wxButton( m_canvas, -1, "Hello", wxPoint(80,50) );
m_canvas->Append( new wxCanvasControl( button ) );
m_canvas->Append( new wxCanvasText( "Hello", 180, 50 ) );
m_canvas->Append( new wxCanvasText( "Hello", 180, 50, "/home/robert/TrueType/times.ttf", 20 ) );
m_timer = new wxTimer( this );
m_timer->Start( 100, FALSE );

2
contrib/src/canvas/Makefile.in
View File

@@ -17,7 +17,7 @@ HEADERS=canvas.h
OBJECTS=canvas.o
APPEXTRADEFS=-I$(top_srcdir)/contrib/include
APPEXTRADEFS=-I$(top_srcdir)/contrib/include -I/usr/local/include
include $(top_builddir)/src/makelib.env

89
contrib/src/canvas/canvas.cpp
View File

@@ -25,7 +25,7 @@
#include "wx/gtk/win_gtk.h"
#endif
#define USE_FREETYPE 0
#define USE_FREETYPE 1
#if USE_FREETYPE
#include <freetype/freetype.h>
@@ -162,39 +162,38 @@ public:
#endif
};
wxCanvasText::wxCanvasText( const wxString &text, int x, int y )
wxCanvasText::wxCanvasText( const wxString &text, int x, int y, const wxString &fontFile, int size )
: wxCanvasObject( x, y, -1, -1 )
{
m_text = text;
m_alpha = NULL;
m_fontFileName = fontFile;
m_size = size;
m_red = 255;
m_red = 0;
m_green = 0;
m_blue = 0;
// test
m_area.width = 128;
m_area.height = 128;
m_alpha = new unsigned char[128*128];
for (int y = 0; y < m_area.height; y++)
for (int x = 0; x < m_area.width; x++)
m_alpha[y*m_area.width + x] = x;
m_area.width = 100;
m_area.height = m_size;
m_alpha = new unsigned char[100*m_size];
memset( m_alpha, 0, m_area.width*m_area.height );
#if USE_FREETYPE
CreateBuffer();
wxFaceData *data = new wxFaceData;
m_faceData = data;
int error = FT_New_Face( g_freetypeLibrary,
"~/TrueType/times.ttf",
m_fontFileName,
0,
&(data->m_face) );
error = FT_Set_Char_Size( data->m_face,
0,
16*64,
96,
m_size*64,
96, // screen dpi
96 );
CreateBuffer();
#endif
}
@@ -239,22 +238,22 @@ void wxCanvasText::Render( int clip_x, int clip_y, int clip_width, int clip_heig
{
int image_x = m_area.x+x;
int image_y = m_area.y+y;
if (alpha == 128)
if (alpha == 255)
{
image->SetRGB( image_x, image_y, m_red, m_green, m_blue );
continue;
}
int red1 = (m_red * alpha) / 128;
int green1 = (m_green * alpha) / 128;
int blue1 = (m_blue * alpha) / 128;
int red1 = (m_red * alpha) / 255;
int green1 = (m_green * alpha) / 255;
int blue1 = (m_blue * alpha) / 255;
alpha = 128-alpha;
alpha = 255-alpha;
int red2 = image->GetRed( image_x, image_y );
int green2 = image->GetGreen( image_x, image_y );
int blue2 = image->GetBlue( image_x, image_y );
red2 = (red2 * alpha) / 128;
green2 = (green2 * alpha) / 128;
blue2 = (blue2 * alpha) / 128;
red2 = (red2 * alpha) / 255;
green2 = (green2 * alpha) / 255;
blue2 = (blue2 * alpha) / 255;
image->SetRGB( image_x, image_y, red1+red2, green1+green2, blue1+blue2 );
}
@@ -271,18 +270,31 @@ void wxCanvasText::CreateBuffer()
FT_Face face = ((wxFaceData*)m_faceData)->m_face;
FT_GlyphSlot slot = face->glyph;
int pen_x = 0;
int pen_y = 0;
int pen_y = m_size;
for (int n = 0; n < m_text.Len(); n++)
for (int n = 0; n < (int)m_text.Len(); n++)
{
FT_UInt index = FT_Get_Char_Index( face, m_text[n] );
int error = FT_Load_Glyph( face, index, FT_LOAD_DEFAULT );
if (error) continue;
error = FT_Render_Glyph( face->glyph, ft_render_antialias );
error = FT_Render_Glyph( face->glyph, ft_render_mode_normal );
if (error) continue;
FT_Bitmap *bitmap = &slot->bitmap;
unsigned char* buffer = bitmap->buffer;
for (int y = 0; y < bitmap->rows; y++)
for (int x = 0; x < bitmap->width; x++)
{
unsigned char alpha = buffer[ y*bitmap->pitch + x ];
if (alpha == 0) continue;
int xx = pen_x + slot->bitmap_left + x;
int yy = pen_y - slot->bitmap_top + y;
m_alpha[ yy * m_area.width + xx ] = alpha;
}
pen_x += slot->advance.x >> 6;
pen_y += slot->advance.y >> 6;
}
@@ -311,6 +323,9 @@ wxCanvas::wxCanvas( wxWindow *parent, wxWindowID id,
{
m_needUpdate = FALSE;
m_objects.DeleteContents( TRUE );
m_red = 0;
m_green = 0;
m_blue = 0;
}
wxCanvas::~wxCanvas()
@@ -331,6 +346,26 @@ void wxCanvas::SetArea( int width, int height )
SetScrollbars( 10, 10, width/10, height/10 );
}
void wxCanvas::SetColour( unsigned char red, unsigned char green, unsigned char blue )
{
m_red = red;
m_green = green;
m_blue = blue;
unsigned char *data = m_buffer.GetData();
for (int y = 0; y < m_buffer.GetHeight(); y++)
for (int x = 0; x < m_buffer.GetWidth(); x++)
{
data[0] = red;
data++;
data[0] = green;
data++;
data[0] = blue;
data++;
}
}
void wxCanvas::Update( int x, int y, int width, int height )
{
m_needUpdate = TRUE;
@@ -342,7 +377,7 @@ void wxCanvas::Update( int x, int y, int width, int height )
int xx,yy,ww,hh;
for (yy = y; yy < y+height; yy++)
for (xx = x; xx < x+width; xx++)
m_buffer.SetRGB( xx, yy, 0, 0, 0 );
m_buffer.SetRGB( xx, yy, m_red, m_green, m_blue );
wxNode *node = m_objects.First();
while (node)
@@ -558,6 +593,6 @@ bool wxCanvasModule::OnInit()
void wxCanvasModule::OnExit()
{
#if USE_FREETYPE
// Close FreeType
FT_Done_FreeType( g_freetypeLibrary );
#endif
}